Dont really care what my abs look like but strong ones help with pretty much any activity. Back problems on the bike often are because of weak abs. If you care about looks besides function, heres a great article on ab exercises.
Marisa Miller Photos - Model Marisa Miller attends the launch of "Very Sexy Dare" at Victoria's Secret at Herald Square on September 2008 in New York City. - Victoria's Secret Celebrates "Very Sexy Dare" With Angel Marisa Miller